Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2086cd8ebc2e5a…

MALICIOUS

PDF

83.7 KB Created: 2021-03-28 13:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 963eed4d112d2e53c9e4cdd105936a0a SHA-1: 2db4c60e72d3d518578f61283e7550de34a89191 SHA-256: bc2086cd8ebc2e5a44ca9236a67a4605fc67762e412dbd60634a5e7ca8bfd590
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/award?keyword=capstone+project+proposal+pdf PDF link annotation
    • https://vorebalulu.weebly.com/uploads/1/3/5/9/135962534/vonuxi.pdfIn PDF document text
    • http://wiinorama.space/what_is_the_magna_carta_us_historyc8mvr.pdfIn PDF document text
    • http://mybestchan.online/fuwifadedodunazupubefi1g7o6.pdfIn PDF document text
    • http://mynasert.online/cordless_speakerphone_with_answering_machinewwehq.pdfIn PDF document text
    • http://powerpoint4you.ru/nazm_hikmet_ark_olan_iirlerinryvo.pdfIn PDF document text
    • https://cdn.sqhk.co/zowuvutevak/p96TwEO/litimaxedesaludemekofiro.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/who_should_play_kvothe.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/47837397778fitld.pdfIn PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/fobifule.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/red_rising_book_series.pdfIn PDF document text
    • http://ontrade.top/flow_chart_symbols_and_their_meaningip9is.pdfIn PDF document text
    • http://disconto50.info/what_is_the_purpose_of_scientific_argumentation_brainlyr93ks.pdfIn PDF document text
    • http://evakuator-uga.ru/how_to_fix_resistance_on_nordictrack_ellipticalfhcne.pdfIn PDF document text
    • https://wewiruvikaju.weebly.com/uploads/1/3/0/7/130775929/givaverake.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/xevefokiborog.pdfIn PDF document text
    • http://by-roof.ru/1490541106084pjk.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/tthdibY/jolteon_plush_tomy.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/fkkihhe/race_against_time_ben_10_full_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_26fd343578f242768e90d665e29c17dc.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_22a00456c47842aaa517715a28bbd1e6.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_7650a26065dc42f7bdaecfe3bd2e5170.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_61e9e38c9df14d25b4068fd47126fd89.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 4988 bytes
SHA-256: d58764a2f258697ff6ddec8ce509904a3bbddb7d14baf398ef9754f7cf13223b
font_01_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 11088 bytes
SHA-256: 55e55d61ad72ff1ce635e154298b43a564ba520524ca9fd09beafa3134ff4d05
font_02_sfnt_off000132fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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